CSI: Crime Scene Investigation

Season 9, Episode 10

Episode Title: One to Go

Air Date: 2009-01-15

Overview:

The CSI team is shocked and saddened when, after working with Dr. Raymond Langston (Fishburne) on the "Dick & Jane" murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.